Power-transmitting mechanism.



No. 829,507. PATENTED AUG. 28, 1906 H. B. COLLINS. POWER TRANSMITTING MECHANISM.

APPLIUATION FILED MAY 25,1904.

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PATENTED AUG. 28, 1906.

H. B. GOLLINS. POWER TRANSMITTING MECHANISM.

APPLICATION FILED MAY 26,1904.

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PATENTED AUG. 28, 1906.

H. B. COLLINS. POWER TRANSMITTING'MEGHANISM.

APPLIUATION FILED MAY25,1904.

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PATENTED AUG. 28, 1906.

H. B. COLLINS. POWER TRANSMITTING MECHANISM.

APPLICATION FILED MAY 25,1904.

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HERMAN B. COLLINS, OF FULTON, NEW YORK.

POWER-TRANSMITTING MECHANISM.

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application filed May 25, 1904. Serial No. 209,659.

To (all whom it n'tcty concern:

Be it known that I, HERMAN B. Counts, of Fulton, in the county of Oswego, in the State of New York, have invented new and useful Improvements in Power-Transmitting Mechanism, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to the class of mechanisms which are employed in connection with an engine or motor for transmitting the power thereof to the object to be driven.

The invention is applicable for various urposes, but is more particularly designe for pro elling motor-vehicles.

he object of the present .invention is to produce a ower-transmitting mechanism which shall e simple in construction, eflicient and reliable in. its operation, and which can be easily and conveniently controlled, whereby the speed imparted to the vehiclewheel shall be effectually regulated and shall permit unrestrained traveling of the vehicle under momentum when the engine or motor is at rest and shall allow the motive power to be cut off and applied at will while the vehicle is under motion without subjectin the mechanism to jar or strain.

Io that end the invention consists in the novel construction and combination of parts of the transmission mechanism, as hereinafter fully described, and set forth in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional view of my invention applied to a bicycle, a portion of the front or driven wheel and frame being partly shown. Figs. 2 and 3 are vertical transverse sections on lines U U and. V V, respectively, in Fig. 1. Figs. 4 and .5 are enlarged outer face views of portions of the main driving-disk, illustrating the eccentric devices for adjusting the ar ore of the auxiliary transmission sprocketwheel and auxiliary driving sprocket-wheels and the idler sprocket-wheels, respectivel Figs. 6 and 7 are sectional views on lines at W and X X, respectively, in Fi s. 4 and 5. Fig. 8 is an enlarged longitudina section on line Y Y in Fig. 1. Fig. 9 is a transverse section on line Z Z in Fig. 8. Fig. 10 is an enlarged detail sectional view showing more clearly the means for locking the main drivjug-Wheels against rotation one at a time.

Referring to the said drawings, A represents a ortion of one of the usual so-called frontork sides of a bicycle-frame, which frame member is provided at its lower end with a bushing a, rigidly secured thereto by means of a suitable clamp 5, formed on said frame member.

B represents an annular casing in which the transmission devices are housed; as hereinafter described. On said casing is mounted a cylinder O of a reciprocatin -piston engine, which may be of any suitalfie and wellknown type and may be supported at its upper end on the bicycle-frame in any convenient manner. Said casing is provided in one end with an opening in which is ri idly secured a bushing c, which protrudes t ierefrom. This bushin and the aforesaid bush ing a are axially in ine with each other and are provided with cxteriorly-screw-threaded portions to which are applied bearing-cones a (1, respectively abutting against said casing and frame member.

D re resents the front wheel of the bicycle, which in the present instance constitutes the driven wheel and has its hub D provided with the usual bearing-cups c e, and between said cups and cones are interposed the usual sets of antifriction-ballsff A denotesthe main rotary shaft which passes freely through said bushings a c and llll) D, and on the end adjacent to the frame member is rigidly mounted a fly-wheel B, which has its hub 9 applied to the shaft with a tapering lit. Said end of the shaft is journaled by means of a bearin -cone h, fastened to the hub of the fly-whee and a bearin cup i, fastened to the outer end of the bus 1- ing a, between which cup and cone are interposed antifriction-balls The said flywheel is secured to the shaft by means of a nut it, applied to the screw-threaded end of the shaft. This shaft is composed of two sections having their adjacent ends disposed within the casing, the section A thereof hav ing its outer end journaled on suitable rollers Z l, interposed between the shaft and a hub Z, formed on the casing. To the inner end of said shaft-section A is rigidly secured a crank m by means of a nut n, applied to the section. On the adjacent end of the main section of the shaft A is rigidly mounted a rotary disk C, preferably formed integral therewith. This disk constitutes the primary driving member of the transmitting mechanism as will be shortly described. Said disk O is pivotally connected to the aforesaid crank m by means of a pin 0 pass ing through said parts and having a head p ICO on one end countersunk in the disk and. provided on the other end with a screw-thrmrd to which is a )plied a nut 9, bearing; on the outer face of t 1e crank.

l) denotes a pitinau or rod which is actuated by the reciprocating piston l) of the engine-cylinder C. The lower end of this pitman is provided with an annular box r, by which it is journaled on the aforesaid pin 0. The said pin is rigidly embraced by a sleeve or bushing s, and the box 1' of the pitman is provided with split bearing-rings t t, and between these rings and sleeve are interposed antifriction-rollers u it. This box 1" is slitted through its lower portion on a line parallel to the axis of the pin 0 and is provided on oppo site sides of the slit with ears I: o, having per forations for the rece tion of a clampingbolt w. Said box is a so provided. in its interior at opposite sides with longitudinal grooves a a, in which are arranged retaining-plates b I), provided with inwardly-[mojecting tongues c c, engaging the slits of the rings and serving to hold the same in position. These rings and the rollers u u are formed from hard steel. To the disk G is fastened a counterlialance-weight (Z by means of a pin (2.

E denotes a revoluble sleeve passing freely through the bushing c of the casing and loosely embracing a ortion of the main shaft A, and which is rigidly fastened at one end to the interior of the hub D of the driven wheel D by means of a clan1pingband f. The said hub l) is provided with an o )ening in one side, as indicated at g, whereby the clamping-band f is allowed to embrace a portion of both the hub and sleeve. This opening ermits the hub to be contracted slightly w ien the clamping-band is tightened, and thereby causes the hub to firmly grip the sleeve. This clamping-band is formed with perforated ears h for the reception of a screw or bolt 5 for tightening the same. On the end of the sleeve E within the casing is rigidly secured a sprocket-wheel F, preferably by means of pins. This sprocket-wheel constitutes the main transmission-wheel, by the rotation of which the said sleeve is caused to impart motion to the driven wheel D. On the adjacent 'end of the aforesaid bushing c and on the shaft A are provided the wellknown bearing-cones j j", respectively, and in the opposite sides of the sprocket-wheel are rovided bearing-cups k is, between which cones and cups are inter osed the usual sets of antifriction-balls Z These bearings and the aforesaid ball-bearings can be readily and simultaneously adjusted by the o eration of the nut is on the opposite end 0? the main shaft A, as clearly shown in Fig. 1 of the drawings.

F represents a sprocket-wheel, which I term an auxiliary transmission-wheel and which is connected to the main transmissionwheel F by means of the usualchainm and has a less number of teeth than the main transmissionwlleel. Said aux i liary sprocketwhecl F is mounted on a barrel 7:, jourualed. on an arbor 0, projecting from the face of the rotary driving-disk (1", which arbor is caused to travel in. a path around the main transmission-wheel F by the rotation of said disk. The said sprocket-wheel F is lirmly locked to the barrel n by means of keys 1, as shown in Fig. 2 of the drawings. The aforesaid arbor 0 is embraced by a sleeve r, which is formed integral with an annular plate 5', which eccentric thereto and is seated on a circumfr-irential beveled shoulder t of an opening provided in the disk C. Said plate 8 is formed with a tapering hub a on its outer face, which hub is screwthreaded both internally and externally, and the outer end portion of the arbor 0 is screw-threaded and engages the internal thread of the hub to allow the arbor to be turned therein to adjust the bearings of the barrel 71. These bearings comprise the usual cones v r and cups to 10, secured to the arbor and barrel, respectively, and antifrictiolrballs SE, :11, interposed between said cones and cups. The outer end of the said arbor is provided with a transverse groove y for the application of a screw-driver for turning the same.

The driving-disk G is provided in its outer face with a circumferential shoulder around the opening referred to, indicated at (1 which. shoulder is concentric to the aforesaid shoulder 22 in the inner face of the disk. On said shoulder a is seated an adjusting-ring b fastened to the aforesaid plate .9 by means of screws c c, which serve to draw the said ring and plate firmly onto their seats. The hub u of said late 8 is provided with radial slits (Z (Z to al ow the same to be compressed to firmly grip the arbor 0 by the tightening of a set-nut 6 applied to the hub, as clearly shown in Fig. 4 of the drawings. The said ring b is rovidcd in its outer face with oppositely-disposed socketsf f for the a plication of the so-callcd "spanner-wrench for turning the eccentric ring and plate, whereby the ring is caused -to shift the arbor 0' in relation to the axis of the sprocket-wheel F, and thereby regulate the tension of the chain m. The casing B is provided in one end with a hand-hole 9' to afford access to the arboradjusting devices and other parts requiring adjustment. This hand-hole is provided with a removable plug of.

G re resents a sprocket-wheel, which 1 term t re main low-speed driving-wheel and which is provided with a cylindrical hub 27', by which it is journaled on the aforesaid rigid bushing c, surrounding the revoluble sleeve E.

G represents an auxiliary or cooperating low-speed sprocket-wheel which is mounted on the aforesaid barrel n, journaled on the arbor 0, and which is connected to the main driving sprocket-wheel G by the usual chain k (Shown in dotted lines.) The gearing of these low-speed driving-wheels G G is preferably of the same ratio as that of the transmission-wheels F F, but of a re verse order-'i. 6., the main transmissionwheel F and auxiliary drivingavheel G in the present instance are each provided with eighteen teeth and the auxiliary transmission-wheel F and main driving-wheel G are provided with seventeen teeth each, thereby reducing substantially nine to one relation )etween the driving-disk C and groundwheel or driven wheel D.

H represents a s rocket-wheel termed the main high-speed driving-wheel which is journaled on the aforesaid cylindrical hub "i of the main low-speed driving-wheel G and rotated independently thereof. H re resents an auxiliary high-speed driving-wheel which is also mounted on the aforesaid barrel n, journaled on the arbor 0, which wheel is connected to the main high-speed wheel by chain or. (Shown in dotted lines.) The number of teeth of these s nocket-wl reels H H" differs from that of the driving-wheels G i, being provided with sixteen and eighteen teeth, respectively, thereby producing substantially a six to one relation between said driving-disk C and driven wheel D. The said auxiliary drivin whecls G H are locked to the said barrel 'n y the aforesaid keys p, and thereby caused to rotate with the auxiliary transmission-wheel F.

I I I represent idler sprocket-wheels upon which the respective chains travel and which are provided with suflicicnt numbers of teeth to equalize the number of teeth in the sets of sprocket-wheels and permit the employment of chains of equal lengths. These idler sprccket-wheels are journaled to rotate in dependently upon a supplcn'iental arbor n projecting from the face of the driving-disk C, and they are preferably provided with antifricticn-bearings consisting of the wellknown rollers 0 0 interposed between the hubs of the said wheels and the arbor. Said arbor n is formed integral with an eccentricplate p seated in the inner face of the disk upon a circumferential shoulder q of an opening provided in the disk, which plate is securely held in its position by a clampingplate p concentric thereto and seatedon a circumferential shoulder q in the outer face of the disk, through which plates pass screws 1" r This clamping-plate is provided with sockets r r in its outer face for the reception of a suitable wrench for turning the plate. To the center of the outer face of the plate 7; is pivoted a concentric spring-plate s", which is provided with a set of apertures t F, arranged to register with the respective screws r r and which are of a, diameter to allow the rounded heads of the screws to protrude slightly thcrethrough.

The pressure of said plate 8 on the said screws prevents the latter from becoming loose, and the said apertures permit the application of a screw-driver to' the screws for turning the same when re quired. The said spring-plate is also pro vided with an additional set of apertures a u intermmliatc the aforesaid apertures and of greater diameter than the heads of the screws and serving to allow the latter to be removed. By turning the plates p 10 which are eccentric to the arbor a the said arbor is shifted in relation to the axis of the transmission-wheel F and driving-wheel G H, thereby forming an additional adjustment for simultaneously regulating the tensions of the chains. It will be noted that by the employment of this latter adjusting device the means for adjusting the aforesaid arbor 0 may be dispensed with, if desired. The outer end of the arbor is provided with a removable annular plate "v serving to retain the idler sprocket-wheels and the rollers 0 0 thereon. To the respective main driving sprocket-wheels G H are rigidly fastened contigrwus disks a? 6 provided with concentric annular frictirm-surl'aces 0, respectively, which are arranged to be engaged by a pair of clanming-plates d d, extending across one end. of the casing B and pivoted at one end thereto, as indicated at c in Fig. 3 of the drawings. On the respective plates d d are formed or rigidly secured a pair of friction-ring sections f f arranged between and adapted to rip the friction-surfaces c c of the disks (t 5" to lock the said sprocketwheels G H one at a time against rotation, as more clearly shown in Fig. 10 of the drawings, and. for the purpose hereiliafter fully described. These ring-sections f f are moved into and out of contact with said l'rictionsurfaces by the movement of the free ends of the plates d d toward and from each other. This movement of the plates d d is effected by means of eccentrics g 9 which are connected to the plates by means of links it 71*, pivotally connected to the free ends of the plates, as clearly shown in Fig. 3 of the drawings. Said eccentrics are fastened to a shaft i", suitably journaled on the casing B, and to said shaft attached an outwardlyextending arm j", to the outer end of which is connected a rod 1*, which may be operated in any suitable manner for actuating the cocentrics. By the employment of the described means for operating said clampingplates compactness added to the construc tion. However, I do not limit myself in this respect; neither do 1 limit myself to the use of said clamping-plates for locking the sprocketwhcels G ll against rotation, inasn'lueh as various devices may be employed for the purpose.

To the periphery of the rotary drivingdisk C is rigidly fastened a cylindrical guard llO 7, surrounding the chain-and-sprocket mechanism, on which. guard the chains are caused to lie by the centrifugal force of the disk in case of their breakage, and thereby prevent them from becoming entangled in the other parts.

To permit the cn'ii'iloyment of large sprocket-wbeels and at the same time maintain a compactness, 1 form the wheels F G, and ll with narrower teeth than the respective cooperating wheels F, G, and ll and provide the teeth of the latter wheels with slots, as indicated at m through which slots the teeth. of the former travel, as clearly shown in Figs. and 6 of the drawings.

My described transmitting mechanism may be employed for various purposes and any motive power maybe used for imparting rotary motion to the primary driving mem ber of the mechanism, which member in. the present instance consists of the described disk C, and inasmuch as I have shown and described said mechanism as a plied to a motor-cycle I shall now proceed to explain the operation of the same in such application, it being understood that any suitable or well-known means may be employed for controlling the en ine. Assuming the engine and bicycle to lie at rest, the main transmission sprocket-wheel F is held likewise by reason of its rigid connection with the driven wheel or ground-wheel D, and the friction. ring-sections f f being out of engagement with the disks a b of the main driving sprocket-wheels G H the latter wheels are free to rotate independently, thereby per niitting free and independent rotation of the driving-disk G and main shaft A with respect to the sleeve E, which connects the main transmission-wheel F to the hub of the driven wheel D. These parts being in the condition described, the bicycle is permitted to be trundled or pedaled in the well-known I manner with entire freedom. If the engine is started while the bicycle is at rest, the pitinan D imparts forward. rotation to the driving-disk and main shaft, and by reason of the sprocket-wheel F being held at rest by the groundwheel D, as stated, this forward rotation of the disk carrying the arbor 0 in a path around the main sprocket-wheels causes the chain m to be laid on and cast off from the sprocket-wheel F, whereby the auxiliary wheel F is rotated rearward and transmits like rotation to the main driving sprocket-wheels G H independently and at different speeds through the sprocket-wheels G"H, respectively, and their connecting-chains k m these latter wheels being connected to the auxiliary transmission sprocket-wheel F in the manner hereinbefore described. These different speeds of the wheels G H are attained by the difference in gearing with the respective connected wheels G H as stated. A person having mounted the bicycle operates the rod k by any suitable means to actuate the eccentrics g g, which move the claimung-plates d d" inward to cause their friction ring-sectionsf to grip the annular friction-surface a of the disk a fastened to the main low-speed driving-wheel G with suilicient firmness to retard the rearward rotation of the latter wheel, whereby the auxiliary low-speed driving-wheel G, carried on the said arbor, is caused to be retarded through the laying on and castin r ofii of its chains k relative to the retarded w eel G. This retarded movement of the wheel G causes the auxiliary transmission-wheel F to be retarded, whereby its chain m imparts like movement to the main transmission-wheel, which latter in turn transmits a forward rotation through the sleeve E to the driven or ground wheel D. It will. be understood that the other driving-wheel H is at this time free to rotate. By increasing the gri of said ring-sections g f on the said disk a the rotation of the main transmissionwheel F is accelerated, and conse( uently increased speed is imparted to t 1e driven wheel, and by firmly ri ping the disk to lock the sprocket-whee (E against rotation the full action of the low-speed Wheels G G is effected in the main transmission-wheel F, whereby the described gearing of these wheels and gearing of the transmissionwheels cooperating therewith causes the driven wheel D to be rotated once during nine revolutions of the driving-disk C. If desired, the person in charge may operate the aforesaid. rod k to move the clampingplates d d outward to cause the friction ringsections f f 3 to grip the friction-surface c of the disk b fastened to the main high-speed driving-wheel H, to lock the same against rotation in the manner described. This movement of the clam ing-plates releases the disk a of the whee G and allows the latter to rotate freely. By looking said sprocket-wheel H the traveling of the arbor 0 around said wheel causes the chain at to be laid on and cast off from the wheel in the manner set forth, which action imparts decreased rotation to the connected wheel H, whereby decreased s eed is transmitted by the wheel F through the sleeve E to the ground or driven wheel Din the ratio of six to one. It will be understood that when the clampingplates d (i are actuated to render operative the transmission-gearing they are under all conditions suflicientl T yielding to eliminate the sudden impact 0 explosion of the engine and insuring a smooth forward impulse to the rider and obviatin the breaking of chains and other parts. y stopping the engine and o crating the said clampingplates to release 0th disks 0 b to allow the s rocketheels G H to rotate freely and inependently the driving-disk C and main shaft A are caused to lose their rotary mo tion, whereby all of the sprocketwheels are permitted to rotate freely w th the driven Wheel D, and thus allow the bicycle to travel under its momentum with little or no friction of said parts. While the engine is at rest and the bicycle is moving, the person mounted on the bicycle can readily start the engine at Will and ap ly the power thereof by the operation of t e clampinglates in the manner hereinafter described. t is obvious that the forward movement imparted to the ground- Wheel may be at any speed slower and the backward movement faster or slower than the rimary driving member, which back- War movement can be obtained by making the relative difference in size of a set of drivin sprocket-Wheels.

Iaving described my invention, what I claim is- 1. In a power-transmittin mechanism, the combination of a main shaft, the driven member free from the shaft, a primary driving member connected to the shaft, a main transmission-Wheel rigidly connected to the driven member, an auxiliary transmission- Wheel carried on the primary driving member and imparting movement to the main transmission-wheel, and suitably-controlled speed-regulating devices connected to the transmission-wheels as set forth.

2. In a power-transmitting mechanism the combination of a main shaft, the driven member free from the shaft, a revoluble sleeve loosely embracing said shaft and imparting motion to the driven member, a main rotary driving member connected to the shaft, a main transmission sprocket Wheel rigidly mounted on the sleeve, an arbor projectin from the main driving member and trave ing in a path around the main transmission sprocket-Wheel, an auxiliary transmission sprocket-Wheel journaled on the arbor, a chain connecting said sprocketwheels, and suitably-supported speedregulatin sprocket-wheels and chains connected to t e auxiliary transmission sprocketwheel, and means for controlling the action of said speed-regulating sprocket-Wheels and chains, as set forth.

3. In a power-transmitting mechanism, the

combination with the driven. member, of a suitablyoperated primary driving member, a main transmission-Wheel connected. to the driven member, an auxiliary transmission- Wheel carried on the primary driving member and impartin movement to the main transmission-whee main and auxiliary driving-Wheels connected to the primary driving member and. transmission-Wheels and geared to efl'ect multiple speeds in the main transmission-wheel, and means for controlling the action of said. drivingwhoels as set forth.

4. In a power-transmitting mechanism, the combination With the driven member, of a suitably-operated primary driving member,

a main transmission sprocket-Wheel connected to the driven member, an auxiliary transmission uproclcct-wheel carried on the primary driving member, a chain connecting the latter sprocket-Wheel to the main transmission sprocket-Wheel, mainv and auxiliary driving sprocket-Wheels, connected to the auxiliary transmission sprocket-wheels and geared, to regulate the speed imparted by the main transmission sprocket-wheel to the driven member, chains connecting the driving sprocket-wheels and means controlling the action of said driving-Wheels as set forth.

5. In a power-transmitting mechanism, the combination with the driven member, of a suitably-operated primary driving member, a main transmission sprocket wheel connected to the driven member, an auxiliary transmission sprocketwheel carried on the primary driving member, a chain connecting said Wheels, loosely-mounted main driving sprocket-Wheels, auxiliary driving sprocket- Wheels rotating with the auxiliary transmission sprocket-Wheel, chains connectin said auxiliary drivin sprocket-wheels Wit1 the respective main iIrivin r sprocket-Wheels, and means for locking the atter Wheels, one at a time, against rotation for the purpose set forth.

6. In a power-transmitti11g mechanism, the

combination of a main shaft, a revoluble sleeve loosely embracing said shaft, the driven member rigidly connected to said sleeve, a rotary driving-disk rigidly secured to the shaft, a main transmission sprocket- Wheel rigidly mounted on the sleeve, an auxiliar transmission sprocket-Wheel journaled on t e disk and connected to the main transmission sprocket-Wheel, a main low-speed driving sprocket-wheel and a main highspeed driving sprocket-wheel journaled independently, auxiliar Y low-speed and highspeed driving sprocket-wheels connected to the respective main driving-Wheels and to the auxiliary transmission sprocket-wheel, and suitably-controlled friction devices operative for locking the main driving sprocket- Wheels, one at a time, against rotation for the purpose set forth.

7. In a power-transmitting mechanism, the combination of a main shaft, a revoluble sleeve loosely embracing said shaft, a drivingdisk rigidly connected to said shaft, the driven member rigidly connected to said sleeve, means operating said disk, a main transmission sprocket-Wheel rigidly mounted on the sleeve, an arbor projecting from the disk and traveling in a path around said sprocket-wheel, an auxiliary transmission sprocket-wheel journaled on said arbor, a chain connecting said transmission sprocketwheels, a main low-speed driving sprocketwheel and a main highspeed sprocket-wheel journaled independently and axially in line with the main transmission sprocket-Wheel,

auxiliary low-speed and high-speed driving sprocket-wheels journaled on the aforesaid arbor and fastened to the auxiliary transmission sproclwt-whecl, separate chains connecting the said low-speed and high-speed driving-Wheels, and means operative for controlling the action of said driving-wheels as set forth.

8. In a power-transmitting mechanism, the combination. with a suitalily-supported cas ing and main rotary shal't extending through the casing and journaled therein, 01' a revoluhle sleeve loosely embracing said shaft, the driven member rigidly connected. to said sleeve, a rotary (having-disk secured to the shaft within the casing, means for rotating said disk, a main transmission sprocketwheel rigidly mounted on the sleeve adjacent to the disk, an arbor projecting from the face of the disk and traveling in a path around the main transn'iission sprocket-wheel, an auxiliary transmission sprocket-wheel journaled on said arbor, a chain connecting said transmission sprocket-wheels, supplemental sprocket-wheels and chains journaled within the casing and actuated by the said disk and operative for imparting different speeds to the transinission-wheels, and suitably-operated means supported on the casing for controlling the action of said supplemental sprocket-wheels and chains for the purpose set forth.

9. in a power-transmitting mechanism, the combination with a suitabkv-supported casing, and a main rotary shaft journaled in said casing, of a revoluble sleeve loosely embracing said shaft, the driven member rigidly connected to said sleeve, a rotary disk rigidly fastened to the shaft Within the casing, a suital'ily-operated crank journaled in the casing and imparting motion to said disk, a main transmission sprocket-wheel rigidly mounted on said sleeve, an arbor projecting from the face of the disk and traveling in a path around said sprocket-wheel, an auxiliary transmission sprocketwheel journaled on said arbor,

a chain connecting said sprocket-wheels, a main low-speed driving sprocket-wheel and a main high-speed driving sprocket-wheel journaled independently in the casing and axially in line with the main transmission sprocketwheel, auxiliary low-speed and high-speed driving sprocket-wheels journaled on the aforesaid arbor and fastened to the said auxiliary transmission sprocket-vvheel, separate chains connecting the low-speed and highspeed wheels respectively, concentric disks rigidly fastened to the main driving s procketwlieels respectively, and plates supported movably on the casing and provided with frictional means for engaging said latter disks to lock the sprocket-wheel thereof, one at a time, against rotation for the purpose set forth.

10. In a power-transmitting mechanism,

the combination of a main rotary shaft, a rcvoluble sleeve loosely embracing said shaft, the driven member rigidly connected to said sleeve, a primary driving member rigidly con nected to said shaft, a main transmission sprocket-Wheel imparting motion to said sleeve, anauxiliary transmission sprocketwheel carried on the primary driving member and connected to the main transmission sprocket wheel, multiple speed driving sprocket-wheels and chains connected to the transmission sprocket-wheels, concentric disks rigidly fastened to the main driving sprocket-wheels respectively, suitablypivoted clamping-plates provided with frictionsurfaces arranged to grip the said disks, one at a time, to lock the latter sprocket wheels against rotation, and means for actuating said clamping-plates as set forth.

11. 111 a power-transihitting mechanism, the combination of a main rotary shaft, a revoluble sleeve loosely embracing said shaft, the driven member rigidly connected to said sleeve, a primary driving member rigidly connected to said. shaft, transniissioi1wlieels con nected to the sleeve and driving member respectively, main driving-wheels, auxiliary driving-wheels connected to the main drivingwheels and transmission-wheels, concentric disks fastened to the main driving-wheels respectively and provided with annular friction-surfaces, a pair of suitably-pivoted clamping-plates each provided with a frictional ring-section arranged to grip the friction-surfaces of the disks, one at a time, to retard the rotation of the main driving-wheels and lock the same against rotation to impart variable speed to the transmission-wheels, and suitably-operated eccentrics for actuating said clamping-plates as set forth.

12. In a power-transmitting mechanism, the combination with a driven member, a pri mary driving member, transmission-wheels connected to the driven member and driving member respectively, multiple-speed main and auxiliary driving-wheels connected to the transmission-wheels, the main drivingwheels having affixed to them respectively concentric disks provided with annular friction-surfaces, a pair of clamping-plates suitably pivoted at one end, levers pivotally con nected to the opposite ends of said plates, eccentrics connected to said levers, a manuallyoperated lever for actuating said eccentrics to move the clamping-plates toward and from each other, and a pair of friction ringsections secured respectively to the plates and arranged to engage the aforesaid friction-sur faces of the disks to lock the main drivingwheels, one at a time, against rotation for the purpose set forth.

13. In a vehicle, the combination with a frame member, a suitably-supported casing, and the driven wheel, of a power-transmitting mechanism comprising a revolublc sleeve journaled at one end in the casing and rigidly main shaft jonrnaled free from said driven connected at its opposite end to the driven wheel, the main shalt passing loosely through said sleeve and journaled at one end on the said frame member and at its other end on the sleeve within the casing, a primary driving member rigidly connected to the latter end of the shaft, a main transmission-whcel rigidly mounted on the sleeve adjacent to said driving member, an auxiliary trans]nission-wheel carried on the primary driving member and imparting motion to the main transmissionwheel, and multi ple-speed d living-wheels connected to the auxiliary transmission-wheel, and means for controlling the action of said driving-wheel as set forth.

14-. In a vehicle, the combination with a frame men'iber, a suitably-supported casing provided with a ri id bushing in one end, and the driven wheel having its hub journaled on said frame member and bushing, of a powertransmitting mechanism comprising a revoluble sleeve passing freely through. said bushing and rigidly connected at one end to the hub of the driven Wheel and having its oppo site end journaled on the bushing, the main rotary shaft passing loosely through the sleeve and jonrnalcd at one end on the frame member and at the other end on the sleeve Within the casing, a rotary driving-disk secured to the shaft Within the casing, a main transmission sproeket-wheel rigidly mounted on said sleeve adjacent to the driving-disk, an arbor projecting from the face of the disk and traveling in a path around the main transmission sprocket-Wheel, an auxiliary transmission sprocket-wheel journaled on said arbor, a chain connecting said transmission S])I'0Cl 6tWl\O(?lS, main driving sprocket- Whcels jo'urnaled independently of the aforesaid bushing, auxiliary driving sprocketwheels journaled on said arbor and fastened to the auxiliary transmission sprocket-Wheel, chains connecting the auxiliary driving- Wheels with the respective main driving Wheels, and means for locking the latter wheels, one at a time, against rotation for the purpose set forth.

15. The combination with a frame member, a suitably-supported casing, and driven wheel jonrnaled on said frame member and easing, of a main rotary shaft free from the hub of said wheel, a revoluble sleeve loosely embracing said shaft and passing through the hub, a clamp locking said hub to the sleeve, a primary driving member secured to the shaft, transmission-Whcels connected to said driving member and sleeve respectively, driving-Wheels connected to one of the transmission-wheels, and friction means supported on the case and operative for engaging one of the driving-wheels for the purpose set forth.

16. in a power-transmission mechanism, the combination with a driven member, of a member, a primary driving member rigidly secured to the shaft, a re volubic sleeve loosely embracing said shaft and imparting motion to the driven member, an arbor carried on the main driving member, a main transmission sprockct-wheel rigidly mounted on said sleeve, an auxiliary bl'fllliillliH-SlUI] sprocket- Wheel journaled on said arbor, a chain eonneeting said transmission s docket-wheels, in dcpendently-rotating main driving sprocket- Wheels axially in line with the main transmission sprocket wheel, auxiliary driving :mrocket-wheels journalcd on said. arbor and fas ened to the auxiliary transmission sprocket-wheel, chains connecting the auxiliary driving spreeket-wheels with the respective main driving EDITH\kOt-WVllQBlS, means for locking the main driving sprocket-wheels against rotation, one at a time and adjusting means connected to said arbor and operative for shifting the same in relation to the axis of the main wheels to simultaneously regulate the tensions of said chains as set forth.

17. in the herein-dcsrribed power-transmitting mecln'inism, the combination with a driven member, of a main rotary shaft free from the driven member, a primary driving member consisting of a rotary disk rigidly fastened to said shaft, a revoluble sleeve loosely embracing the shaft and imparting motion to the driven member, a main transmission sprocket-Wheel rigidly mounted on the sleeve, an arbor projecting from the disk, an auxiliary transmission sprocket-Wheel journaled on said arbor, a chain connecting said transmission sprocket-Wheels, suitablysupported main low-sp0ed and high-speed driving sprocketavheels adapted to rotate indepernlently, auxiliary low-speed and highspced driving sprocket-wheels journaled 0n the aforesaid arbor and rotating with the auxiliary transmission sprocket-wheel chains connecting the auxiliary driving-Wheels with the respective main driving-wheels, manually-operated means for locking the main low-speed and main high-speed drivingwhevls against rotation, one at a time, and eccentric adjusting means operative for shlfting said arbor in relation to the axis of the main spriwhet-wheels to simnltanoously regulate the tensions of the chains as setforth.

l8. in the hereiii-described power-transmitting mechanism, the combination with a driven member, of a rotary main shaft free from said driven member, a rotary drivingdisk fastened to said. shaft, a revolnble sleeve loosely embracing said shaft and iniparting motion to the driven member, a main transmission sprocket-wheel mounted rigidly on the sleeve, an arbor projecting from the disk, an auxiliary transmission sprocket-Wheel jonrnaled on said arbor, a chain connecting said spriickot-wheels, main low-speed and high-speed sprocket-wheels journaled to ro- IIO tale independently and disposed axially in line with the main transmission sprocket wheel, auxiliary low-speed. and high-speed driving sprocket-wheels journaled on said arhor and rotating with the auxiliz'iry transmission sprocket-wheel, chains connecting the auxiliary driving-wheels with the respective main drivirig-wheels means for looking the main driving sprocket-wlreels against rotation, one at a time, for the purpose deserihed, a supplen'iental arbor projeeting from the said disk, and idler sprocket-wheels journaled on the latter arhor and supporting the respective chains as set forth.

1). In the herein-descrihed power-transmitting mechanism, the combination with the main shaft, a revolul'ile sleeve embracing said shaft, the driven member rigidly connected to said sleeve, a rotary driving-disk rigidly secured to the shaft, a main transmissien sproeket-wheel secured to the sleeve, an auxiliary transmission sproeket-wl'ieel journaled on the disk, a chain connecting said sprocket-W11eels, a main low-speed driving sprookctwwheel and a main. high-speed. driving sproeket-wheel journaled independently, auxiliary low-speed and high-speed driving s )roeketevheels connected to the respective main driving-wheels and to the auxiliary transmission sprocket-Wheel, suitahly-eontrolled devices operative for locking the main driving sproeket-Wheels one at a time, against rotation, and a guard carried on the aforesaid disk and surrounding the sprocketwheels and ehains for the purpose set forth. 35

HERMAN B. (OLLINS \Vitnesses J. J. LAAss, L. H. FULMER. 

